Business Acquisitions - Summary Of Final Fair Values Of Assets Acquired And Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 01, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Receivables		$ 1,185
Other current assets		285
Property and equipment		147
Goodwill	2,900	8,853
Total assets acquired		10,470
Deferred tuition revenue		681
Total liabilities assumed		681
Net assets acquired		$ 9,789